All horses mouths are not created equal,
nor should all bits be. The Nunn Finer shaped mouthpiece allow more room
for the horse that a regular shaped bit does not. Keeping the horse
from being fussy and resistant. The German Silver keeps the horse
salivating allow the mouth to be softer.

The Nunn Finer German
Silver cartwheel bits are all designed to give riders extra control
over speed and direction while keeping the horse soft enough to gain
lift and not curl. The mouthpiece attaches to a post running vertically
through the center of the bit rings, giving a slight tilting as well as
lifting action. The design also avoids pinching. Cartwheel bits give
riders more control than a snaffle, but milder than most gag.